Carpet sweeper



Dec. 27, 1932. w. H. KENYON CARPET SWEEPER Filed Jan. 2. 1930 2 Sheets-Sheet 1 I I I I I I I l I I l I 123 I I I g. I I I I I I I I l I I I I I I I I l I I Fig.1.

Dec. 27, 1932. KENYQN 1,892,368

CARPET SWEEPER Filed Jan. 2. 1950 2 Sheets-Sheet 2 Patented Dec. 27, 1932 Ul' l i ltlfi STATiE PATENT @FFICE WILLIAM: HENRY KENYON, O23 ACCRINGTON, ENGLAND, ASSIGNOR TO ENTWISLE & KENYON LIIIITED, 0F ACGRINGTGN, ENGLAND CARPET SWEEPER Application filed January 2, 1930, Serial No. 418,103, and in Great Britain March 12, 1929.

This invention relates to carpet sweepers .:onstruuted with four wheels and brushes rotated thereby.

In carpet sweepers the wheels are mounted on two axles extending from end to end of he sw e1 casing carried at each end on one the othe end of each spring being anchored on pin or stud on the end of the casing, and axles are drawn together at the ends by known as brusn drive springs, placed he ends of the sweeper casing to press .ro frictional contact with the loys on each end of ti e brush so that as the sweep moved over the floor the brush will be rot..tec. The end of each axle is also provided with a washer or plate on the outside or the end of the casing and such washer oi ate serves to cover the enlarged hole in the end oi the casing through which the axle nro'ects. The axles on which the l I 1 wheels are mounted are thus controlled at each end by two springs, one arranged inside the cash which keeps the wheels in frictional d1 contact with the brush pulley and the other outside the end of the casing which serves to control the position of the wheels and to allow the casing to be moved downwards relatively to the wheels to bring the brush into contact with the fioor when pressure is applied to the casing through the handle.

".in di advantages arise from the dis poution of the brush drive spring inside the casn inasmuch as it extends for part of its len 1 inside the dust pans and becomes covered with the dust, fibres and hairs collected therein and moreover access to it is difiicult when it is desired to clean, repair or renew it. i

The object of the present invention is to remove such disadvantages and the invention consists in disposing the brush drive springs as well as the axle springs on the outside of the ends of the casing instead of the brush drive spring being inside the casing as has hitherto been the usual custom.

The invention will be fully described with reference to the accompanying drawings F 1 isa plan View of sweeper.

Fig. 2 is an end View of sweeper showing one form of the invention.

Fig. 3 is an end view of sweeper showing another form of the invention.

Fig. d is an end view of sweeper showing another form of the invention.

Figs. 5 and 6 are an end view and a sectional plan view showing details or" construction.

Figs. 7 and 8 are details of plates.

Figs. 9 and 10 are end views showing other forms of the invention.

The sweeper ends A, the axles B and the axle springs C on the outside of the end are of known construction.

In carrying out the invention the brush drive spring D or D is disposed on the outside of the end A of the casing and comprises a bent or curved strip of wire extending from one axle to the other, or a separate spring fitted to each axle.

In the form shown in Figs. 1, 2 and 3 a single brush drive spring D extends across from one axle B to the other embracing both, the spring being of such a shape as to draw the ends of the two axles together. The central portion of the spring D may be shaped to pass above the cam bracket E which locates the position of the bail holder as in Fig. 2 or to pass below the cam bracket and between it and the brush neck aperture a as in Fig. 3.

The axle springs C are placed to the side of the axle remote from the brush, being anchored or attached at one end to the axle and at the other end to the end of the casing at a point 0 above and outside the centre line of the axle.

In the form shown in Fig. 4 a separate brush drive spring D is applied to each axle. It is preferably of approximately inverted S or double bow shape or other shape that will tend to exert its maximum pressure in a lateral horizontal direction against the end of the axle B and is disposed with the bow of the spring on the side of the axle remote from the brush and to force the axles towards each other and is anchored or attached to the end of the casing at a point to the outside of the axle and either above, below or in line with the centre thereof, but preferably as far he- 5 low the centre of the axle as practicable. The axle springs C are disposed between the axle and the axis of the brush and are bowed inwards towards the brush, one end being anchored or fixed on the axle and the other end being anchored or fixed to the end of the casing at a point 0 above the axle and preferably towards the edge of the casing.

In either form a washer or plate cover ing the enlarged aperture in the end of the casing through which the axle projects is placed on the outside of the casing, and the ends of the brush drive spring D or D (whether a single spring or separate spring for each axle is employed), is anchored. or

'20 fixed to the plate or washer F at one side of the axle so that the spring or springs will force the axles inwards to apply the neces sary pressure from the driving wheels to the pulley to rotate the brush.

The flat plate or washer F is formed with a keyhole slot to allow it to be passed over the round end of the axle and over a flat portion of the axle to prevent the latter from rotating. Or the slot in the flat plate or washer F may be of the width of the flat portion of the axle through out its length and extend to the edge of the washer.

In the forms shown in Figs. 9 and 10 the brush drive springs D or D and the axle springs C or C are anchored direct on to the wheel axles.

What I claim as my invention and desire to protect by Letters Patent is A carpet sweeper comprising in combination a casing, two axles upon which the casing is carried, wheels rotatably mounted on each end of each axle, a brush centrally disposed between the axles mounted to rotate within the casing, a spindle carrying the brush, a pulley on each end of the brush spindle engaging a wheel on each axle by which the spindle and brush are rotated, C springs one end of each of which is aflixed to the outside of the casing and the other end of each to the wheel axles to support the casing on the axles, flats on the axles, keyhole slotted washers mounted on the flats on the axles to prevent rotation thereof and close the axle holes in the casing and further 6 springs out- 0 side the casing extending between the axles with their ends affixed to the washers to keep the wheels in driving contact with the brush pulleys.

In testimony whereof I have hereunto set my hand this 16th day of December, 1929.

WILLIAM HENRY KEI YON. 

